Conduit



Sept. 9, 1924. 1,508,347

J. O. MONTREUIL.

CONDUIT Filed Nov. 15. 1923 i Z7193 N W Q XN WITNESSES INVENTORJOJVO/WPEU/L .4 TTORNEYS Patented Sept. 9, 1924.

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GONDUIT.

Application filed November 15, 1921. Serial No. 515,346.

To all whom it may concern:

Be it known that I, JOSEPH OVILA MON- TREUIL, a subject of the King ofGreat Britain, and'a resident of Quebec, in the Province of Quebec andDominion of Canada, have invented a new and Improved Conduit, of whichthe following is a full, clear, and exact description.

This invention relates to improvements in conduits, particularly to thatform of conduit ordinarily used as a drain or culvert pipe.

An object of the invent-ion is to provide a conduit which will be lightin weight, compact to transport, and unlikely to break duringtransportation, easy to assemble, simple and practical in construction,strong, durable and efficient in use, and comparatively inexpensive tomanufacture.

With these and other objects in View, the invention consists in certainnovel features of construction and combinations and arrangements ofparts as will be more fully hereinafter described and pointed out in theclaims.

In the accompanying drawings:

Figure 1 is a perspective view showing several sections of my improvedconduit assembled;

Figure 2 is an enlarged view in section on the line 22 of Figure 1;

Figure 3 is a similar view on the line 33 of Figure 1; and

Figure -:l is a reduced end view showing the compact manner in which theslabs forming the conduit sections may be packed for shipment.

My improved conduit is triangular in cross section and comprises aplurality of interlocking sections, each section including a pluralityof interlocking slabs.

Referring more specifically to the drawings, I have used the referencenumeral 1 to designate rectangular slabs of concrete or similarmaterial. Each slab is formed adjacent one side edge with a longitudinalgroove 2, adapted to interlock with a longitudinal tongue 3 in theadjacent edge of an adjacent slab. These slabs interlocked in thismanner cooperate to form a pipe sec tion which is of equilateraltriangular cross sectional shape. It will be noted that while I do notlimit myself to the exact shapes of the interlocking tongues andgrooves, Iprefer to use any interlock which permits of each slab beingidentical in shape.

The ends of the slabs forming one pipesection are externally reduced orcut away,

as indicated at 4 to conveniently accommodate the adjacent ends of theslabs of an adjacent section, these last mentioned sla'lbs beinginternally cut away as indicated at 5. Two adjacent sections of pipe arethus joined by the spigot joint above described.

The pipes may be reinforced in any approved manner. a

Although I have illustrated one of the preferred embodiments of myinvention, it will be evident that various slight changes andalterations might be made in the general form and arrangement of theparts described without departing from the invention, and hence I do notwish to limit myself to the precise; details set forth, but shallconsider myself at liberty to make such slight changes and alterationsas fairly fall within the spirit and scope of the appended claims.

I claim: y

1. In a conduit section of the type including a plurality of identicalinterlocking wall members wherein each wall member near one side edgehas an elongated tongue running parallel to said side edge and has nearthe opposite side edge a groove running parallel to the last-mentionedside edge, such groove being adapted to take the tongue of a laterallyadjoining wall member, the combination of three such wall members forforming a conduit section, each wall member having plane parallel facesand having one of its side edges plane and perpendicular to the faces ofsaid member and having its other side edge plane and at an angle of tosaid faces; whereby when three of said wall members are assembled withtheir tongues and grooves interiitting there is provided a conduitsection of uniform. wall thickness and with an inner perimeter and anouter perimeter both defining a perfect and uninterrupted e uilateraltriangle, and whereby, for sa ety and compact arrangement intransportation and storage, a plurality of piles of the wall members maybe arranged alongside each other and with the wall members of each pilein face to face contact and with the 60-inclined side edge of eachsuccessive wall member in a pile reversely arranged but verticallyaligned and with the lastmentioned side edge of each wall member of apile and the same side edge of a Wall member and forming alongitudinalgroove, member at the same level in an adjoining the end of each memberhaving a tongue 15 pile in face to face contact. engaging the groove ofan adjacent mem- 2. A triangular shaped conduit section, ber, wherebythe members Will be firmly 5 consisting of three similar fiat members,united, the sections Will present a smooth each member having adjacentone end on its outer surface so that the liability of the inner face aV-shaped notch forming a members being effected by the freezing and 20tongue at the end of the member, and at thawing of the ground is reducedto a minithe other end a notch of greater size than mum and the membersWhen disassembled 10 the first notch, said notch leading out can bepacked in a comparatively small through the end of the member and extendspace for transportation. ing inward from said end a distanceapproximately equal to the thickness of a d. UVILA MONTREUIL.

